Water quality is the key factor for the smooth execution of various procedures in a laboratory such as the execution of chemical analysis, atomic absorption, automatic analyzers, solution preparation, experiments, PCR method, etc. Each laboratory takes care to ensure deionized and ultra-pure water to deliver reliable results. Deionized water is produced by two-column deionizers as well as mixed bed deionizers, which remove the dissolved salts that are present in water. The deionization process results in low conductivity water, suitable for laboratory experiments, solution preparation, purification and general uses in the laboratory. Also, electro-deionization systems (EDI) have the ability to produce ultra-pure water with a specific resistance of up to 18 μΩ.